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CSIR Physics Question Paper with Answers June And December 2011

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The acceleration due to gravity (g) on the surface of Earth is approximately 2.6 times that on the surface of Mars. Given that the radius of Mars is about one half the radius of Earth, the ratio of the escape velocity on Earth to that on Mars is approximately 1. 1.1 2. 1.3 3. 2.3 4. 5.2

A resistance is measured by passing a current through it and measuring the resulting voltage drop. If the voltmeter and the ammeter have uncertainties of 3% and 4%, respectively, then A. The uncertainty in the value of the resistance is 1. 7.0% 2. 3.5% 3. 5.0% 4 12A%

If an eIectron is in the ground state of the hydrogen atom, the probability that its distance from the proton is more than one Bohr radius is approximately 1. 0.68 2. 0.48 3. 0.28 4. 0.91